TPS1H100-Q1: Selection of Current Driver IC for Variable Output Current Requirements

Lokesh Nelavalli

Part Number: TPS1H100-Q1
Other Parts Discussed in Thread: TPS2H000-Q1

Tool/software:

Hi Team,

We are currently using the TPS1H100-Q1 IC, which supports an Adjustable minimum output current of 500mA. We have also reviewed the TPS2H000-Q1 IC, which supports an Adjustable output current range from a minimum of 50mA up to a maximum of 900mA.

Our design concept involves the MCU controlling the output current in two modes:

Self-test mode: The MCU enables the self-test mode pin, setting the output current to 5mA of High-side power switch, during the self-test to monitor voltage and current for diagnostic.
Normal operation mode: After the self-test is completed, the MCU enables the appropriate control pin to set the output current to 40mA, thereby disabling the 5mA self-test mode pin.

Given that the selected ICs support output current limits starting at 500mA and 50mA respectively, we would like to request your recommendation for an automotive-qualified IC that can reliably support an output current range starting as low as 5mA and scaling up beyond 40mA, with full compliance to automotive standards. and the operating voltage is 6V-36V

Please advise if you have any suitable IC recommendations or alternatives that meet these requirements.

Regards,

Lokesh

3 months ago

0 Alan Whitehead 3 months ago

TI__Genius 10285 points

Hey Lokesh,

I will look over this and get back to you by EOB 6/13.

BR,

Alan

0 Lokesh Nelavalli 3 months ago in reply to Alan Whitehead

Prodigy 90 points

Hi Alan,

Thanks for your reply.

I have one more doubt.

In simulations, both TPS1H100-Q1 and TPS2H000-Q1 ICs are showing expected output currents of 5 mA and 40 mA. However, during practical testing, the TPS1H100-Q1 does not achieve the 5 mA of output current.

can I expect the TPS2H000-Q1 to achieve the expected output current in practical testing?

These simulations are done in TINA

The simulation results are